xbxdbd

damiaa posted on 2024-3-13 10:40 If it can be burned, remember to restore the grounding after burning so that you can run your own program.

If I want to modify the program in the future, do I have to remove the circuit board casing to download it, connect the resistor to 3.3v, and then connect it back to ground after downloading? Is there any way to download the program directly without removing the casing?

damiaa

xbxdbd posted on 2024-3-13 11:24 Then if I want to modify the program in the future, I have to remove the circuit board shell to download it and connect the resistor to 3.3v, and then connect it back to ground after downloading...

Can it be burned? Your circuit is not designed. If the circuit is designed, you can actually use the IO of ch340G to control boot0.

You can look at other people's isp serial port downloader information. They will talk about this. The image of your initial downloader has the control port of boot0.

If you want to update the program with boot0 as low level, you can only upgrade the user program and make a user bootloader program update by yourself. That is troublesome.

xbxdbd

damiaa posted on 2024-3-13 12:58 Can it be burned? You haven't designed this circuit. If the circuit is designed. You can actually use the IO of ch340G to control boot0. You can take a look...

I can download it. I used the CH340G module to download it. It's like this. I have two boards communicating via serial ports. One board controls the other circuit board. If it is upgraded, one of my circuit boards can download the program without removing the shell. The other one is designed to be able to burn the program without removing the shell. If I follow your method, I still have to connect the resistor to the ground to run the program every time I download the program. Doesn't this still require removing the shell? I don't know if you understand what I mean.

damiaa

xbxdbd posted on 2024-3-13 13:09 I can download it. I used the CH340G module to download it. It's like this. I have two boards communicating via serial ports, and one board controls the other circuit...

If you don't remove the outer shell, the circuit board still has a programming interface, right? If there is the io you introduced to control boot0

That is, power, ground, tx, rx and boot0 control legs.

Of course, the receiving board must also be controlled by boot0, for example, boot0 is connected like this:

damiaa

xbxdbd

damiaa posted on 2024-3-13 13:38 If you don't remove the outer shell, the circuit board still has a programming interface, right? If there is the io you introduced to control boot0, that is, power, ground, tx, rx...

What does that mean? How can I connect it? I downloaded this using the ch340G module.

Here is the schematic

According to what you mean, is it to add a switch to BOOT0 and then lead out a boot0 pin? Then it is 5v RX TX GND boot0. Then my other board has this

. This square port connects to the 4PIN interface of the green board above. My original design is like this. If I want to upgrade the program of this green board, I will directly use this square female head to make an adapter, and connect it directly to the computer. In this way, I don't need to remove the shell of the two boards. Then according to what you mean, I don't understand how to connect the two boards. Aren't these cables all 4-core?

HUA3

Hello, can you please leave me your contact information? My CH340G can't recognize my computer either.